#!/usr/bin/env python

from __future__ import annotations

import os
import datetime
import subprocess

import gradio as gr
import spaces


@spaces.GPU(duration=60 * 3)
def run_on_gpu(input_shape):
    print('Started inference at {}'.format(datetime.datetime.now()))
    call_base = ['python', 'ppsurf/pps.py', 'rec']
    call_args = ['pps.py',
                 'rec',
                 'data/{}'.format(input_shape),
                 'results/rec/{}'.format(input_shape),
                 ]
    res = subprocess.check_output(call_base + call_args)
    print('Finished inference at {}'.format(datetime.datetime.now()))

    return res


def main():
    description = '''# [PPSurf](https://github.com/cg-tuwien/ppsurf)
    
    Supported file formats: PLY, STL, OBJ and other mesh files, XYZ as whitespace-separated text file, 
    NPY and NPZ (key='arr_0'), LAS and LAZ (version 1.0-1.4), COPC and CRS.
    Best results for 50k-250k points. 
    
    This method is meant for scans of single and few objects. 
    Quality for scenes and landscapes will be lower.
    
    Inference takes about 2 minutes.
    '''

    def convert_to_ply(input_point_cloud_upload: gr.File):
        print('inputs:', input_point_cloud_upload.value)
        input_shape = input_point_cloud_upload.value[0]
        if not input_shape.endswith('.ply'):
            # load file
            from ppsurf.source.occupancy_data_module import OccupancyDataModule
            pts_np = OccupancyDataModule.load_pts(input_shape)

            # convert to ply
            import trimesh
            mesh = trimesh.Trimesh(vertices=pts_np[:, :3])
            input_shape = input_shape + '.ply'
            mesh.export(input_shape)

        # show in viewer
        input_tabs.selected = 'pc_viewer'
        input_point_cloud_viewer.value = input_shape

    if (SPACE_ID := os.getenv('SPACE_ID')) is not None:
        description += (f'\n<p>For faster inference without waiting in queue, '
                        f'you may duplicate the space and upgrade to GPU in settings. '
                        f'<a href="https://huggingface.co/spaces/{SPACE_ID}?duplicate=true">'
                        f'<img style="display: inline; margin-top: 0em; margin-bottom: 0em" '
                        f'src="https://bit.ly/3gLdBN6" alt="Duplicate Space" /></a></p>')

    with gr.Blocks(css='style.css') as demo:
        gr.Markdown(description)
        with gr.Row():
            with gr.Column():
                with gr.Tabs() as input_tabs:
                    with gr.TabItem(label='Input Point Cloud Upload', id='pc_upload'):
                        input_point_cloud_upload = gr.File(
                            show_label=False, file_count='single')
                        input_point_cloud_upload.upload(fn=convert_to_ply,
                        inputs=[
                            input_point_cloud_upload,
                        ],
                        outputs=[
                            # input_point_cloud_viewer,  # not available here
                        ])
                        # input_point_cloud_upload.attach_load_event(convert_to_ply, every=None)
                    with gr.TabItem(label='Input Point Cloud Viewer', id='pc_viewer'):
                        input_point_cloud_viewer = gr.Model3D(show_label=False)
                gen_resolution_global = gr.Slider(
                    label='Grid Resolution (larger for more details)',
                    minimum=17, maximum=513, value=129, step=2)
                padding_factor = gr.Slider(
                    label='Padding Factor (larger if object is cut off at boundaries)',
                    minimum=0, maximum=1.0, value=0.05, step=1)
                gen_subsample_manifold_iter = gr.Slider(
                    label='Subsample Manifold Iterations (larger for larger point clouds)',
                    minimum=3, maximum=30, value=10, step=1)
                gen_refine_iter = gr.Slider(
                    label='Edge Refinement Iterations (larger for more details)',
                    minimum=3, maximum=30, value=10, step=1)
                # run_button = gr.Button('Run')
            with gr.Column():
                progress_text = gr.Text(label='Progress')
                with gr.Tabs():
                    with gr.TabItem(label='Reconstructed 3D model'):
                        result_3d_model = gr.Model3D(show_label=False)
                    with gr.TabItem(label='Output mesh file'):
                        output_file = gr.File(show_label=False)
        # with gr.Row():
        #     examples = [
        #         ['shapes/dragon1.obj', 'a photo of a dragon', 0, 7.5],
        #         ['shapes/dragon2.obj', 'a photo of a dragon', 0, 7.5],
        #         ['shapes/eagle.obj', 'a photo of an eagle', 0, 7.5],
        #         ['shapes/napoleon.obj', 'a photo of Napoleon Bonaparte', 3, 7.5],
        #         ['shapes/nascar.obj', 'A next gen nascar', 2, 10],
        #     ]
        #     gr.Examples(examples=examples,
        #                 inputs=[
        #                     input_point_cloud_viewer,
        #                     text,
        #                     seed,
        #                     guidance_scale,
        #                 ],
        #                 outputs=[
        #                     result_3d_model,
        #                     output_file,
        #                 ],
        #                 cache_examples=False)

        with gr.Row():
            run_button = gr.Button('=> Run PPSurf =>')

        run_button.click(fn=run_on_gpu,
                         inputs=[
                             input_point_cloud_viewer,
                             gen_resolution_global,
                             padding_factor,
                             gen_subsample_manifold_iter,
                             gen_refine_iter,
                         ],
                         outputs=[
                             result_3d_model,
                             output_file,
                             progress_text,
                         ])

    demo.queue(max_size=5)
    demo.launch(debug=True)


if __name__ == '__main__':
    main()